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I would also like for people to discuss the advantages and disadvantages to using an oversized crank pully to get more out of your alternator.
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Ill just overdrive my alt with a smaller pulley. Im not sure is Im comfortable overdriving my PS pump etc.
I also dont understand the advantage of using a larger crank pulley for overdriving a S/C when a smaller S/C pulley would do the same job without extra stress on the other accessories
oh, the 2.4 uses the cams to do the power steering IIRC, the only things on the belt is the alt, ac compressor, and the tensioner.... so the only thing getting the extra stress would be the ac compressor and alt. I didnt know the 2.2 was diferent.....
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another thing to think about with the underdriven pullies would be the belt slippage, with the stock size pully on the alt, you have more surface area for the belt to grab, meaning less slippage. if you under drive it you may gain some rpm's on it, but you run the risk of major belt slip. Just somthing to think about.
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Thats what the tensioner is for.
TheSundownFire (JBO Chat) wrote:Thats what the tensioner is for.
But with H/O alts (atleats the one i had) takes more power to turn them under load, hence the reason why smaller pullies slip, i would rather get the power out of a stock sized pully. Is there any toher downfalls other than the fact that you may lose some horsepower without a supercharger?
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The only thing I dont like about overdriving is the fact that spinning faster than normal a lot makes the alt wear out faster. Given I got a used alt but I think my bushings in the alt are already going out and it frigging screams when I give the car a run to 6k rpms.
TheSundownFire (JBO Chat) wrote:The only thing I dont like about overdriving is the fact that spinning faster than normal a lot makes the alt wear out faster. Given I got a used alt but I think my bushings in the alt are already going out and it frigging screams when I give the car a run to 6k rpms.
brian, im not trying to agree with anton here... but if you OD the alt with a smaller pulley on it, it sees the same rpm (granted you're ODing the same amount) as you would with a larger crank pulley (again, this is if you're ODing by the same amount).just because whats making it spin faster has changed, the alt would still see the same rpm.
car audio noob since 1984.
Im just talking about overdriving in general not just with a smaller alt pulley. If I had a choice I wouldnt be overdriving my alt but I couldnt get a long enough belt to work with the AD244. Overdriving whether is be a larger crank pulley or a smaller alt pulley is going to make parts wear out earlier.
Oh and just thought of something else. Changing the alt pulley atleast for me is going to be way easier than fenagling my way down to change the crank pulley.
TheSundownFire (JBO Chat) wrote:Oh and just thought of something else. Changing the alt pulley atleast for me is going to be way easier than fenagling my way down to change the crank pulley.
changing the crank pully was probably the easiest thing ive ever done, and ive done it 3 times, once to put an underdrive on my car then to put my stock one back on then to put the underdrive on a buddies car, just need to take the passenger tire off and the splash gaurd and the pully is right there. it takes you longer to take the alt out then it does to do this (on the 2.4). on the 2.4 the alternator is a biatch to get out, no space at all.
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I did an alt on a 2.4 in a parking lot in the snow. Hahah worst hour of my life
